diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 9a829a7cbc60..66bd0e83ac07 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -2,6 +2,7 @@
  *    pata_sis.c - SiS ATA driver
  *
  *	(C) 2005 Red Hat <alan@redhat.com>
+ *	(C) 2007 Bartlomiej Zolnierkiewicz
  *
  *    Based upon linux/drivers/ide/pci/sis5513.c
  * Copyright (C) 1999-2000	Andre Hedrick <andre@linux-ide.org>
@@ -35,7 +36,7 @@
 #include "sis.h"
 
 #define DRV_NAME	"pata_sis"
-#define DRV_VERSION	"0.5.1"
+#define DRV_VERSION	"0.5.2"
 
 struct sis_chipset {
 	u16 device;				/* PCI host ID */
@@ -237,7 +238,7 @@ static void sis_old_set_piomode (struct ata_port *ap, struct ata_device *adev)
 }
 
 /**
- *	sis_100_set_pioode - Initialize host controller PATA PIO timings
+ *	sis_100_set_piomode - Initialize host controller PATA PIO timings
  *	@ap: Port whose timings we are configuring
  *	@adev: Device we are configuring for.
  *
@@ -262,7 +263,7 @@ static void sis_100_set_piomode (struct ata_port *ap, struct ata_device *adev)
 }
 
 /**
- *	sis_133_set_pioode - Initialize host controller PATA PIO timings
+ *	sis_133_set_piomode - Initialize host controller PATA PIO timings
  *	@ap: Port whose timings we are configuring
  *	@adev: Device we are configuring for.
  *
@@ -334,7 +335,7 @@ static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	int drive_pci = sis_old_port_base(adev);
 	u16 timing;
 
-	const u16 mwdma_bits[] = { 0x707, 0x202, 0x202 };
+	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
 	const u16 udma_bits[]  = { 0xE000, 0xC000, 0xA000 };
 
 	pci_read_config_word(pdev, drive_pci, &timing);
@@ -342,15 +343,15 @@ static void sis_old_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	if (adev->dma_mode < XFER_UDMA_0) {
 		/* bits 3-0 hold recovery timing bits 8-10 active timing and
 		   the higer bits are dependant on the device */
-		timing &= ~ 0x870F;
+		timing &= ~0x870F;
 		timing |= mwdma_bits[speed];
-		pci_write_config_word(pdev, drive_pci, timing);
 	} else {
 		/* Bit 15 is UDMA on/off, bit 13-14 are cycle time */
 		speed = adev->dma_mode - XFER_UDMA_0;
 		timing &= ~0x6000;
 		timing |= udma_bits[speed];
 	}
+	pci_write_config_word(pdev, drive_pci, timing);
 }
 
 /**
@@ -373,7 +374,7 @@ static void sis_66_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 	int drive_pci = sis_old_port_base(adev);
 	u16 timing;
 
-	const u16 mwdma_bits[] = { 0x707, 0x202, 0x202 };
+	const u16 mwdma_bits[] = { 0x008, 0x302, 0x301 };
 	const u16 udma_bits[]  = { 0xF000, 0xD000, 0xB000, 0xA000, 0x9000};
 
 	pci_read_config_word(pdev, drive_pci, &timing);
@@ -432,8 +433,7 @@ static void sis_100_set_dmamode (struct ata_port *ap, struct ata_device *adev)
  *	@adev: Device to program
  *
  *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
- *	Handles early SiS 961 bridges. Supports MWDMA as well unlike
- *	the old ide/pci driver.
+ *	Handles early SiS 961 bridges.
  *
  *	LOCKING:
  *	None (inherited from caller).
@@ -467,8 +467,6 @@ static void sis_133_early_set_dmamode (struct ata_port *ap, struct ata_device *a
  *	@adev: Device to program
  *
  *	Set UDMA/MWDMA mode for device, in host controller PCI config space.
- *	Handles early SiS 961 bridges. Supports MWDMA as well unlike
- *	the old ide/pci driver.
  *
  *	LOCKING:
  *	None (inherited from caller).